Community structures and population dynamics of 'Candidatus Accumulibacter' in activated sludges of wastewater treatment plants using ppk1 as phylogenetic marker
| Autor: | Jingjing Guo, Yongzhen Peng, Limin Zhang, Wei Zeng, Pengchao Fan |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
China Environmental Engineering 030106 microbiology Population Candidatus Accumulibacter Wastewater 010501 environmental sciences Biology Waste Disposal Fluid 01 natural sciences 03 medical and health sciences Denitrifying bacteria RNA Ribosomal 16S Botany Environmental Chemistry Water Pollutants education Clade Phylogeny 0105 earth and related environmental sciences General Environmental Science education.field_of_study Nitrates Sewage Phosphorus General Medicine biology.organism_classification Activated sludge Enhanced biological phosphorus removal Candidatus |
| Zdroj: | Journal of Environmental Sciences. 67:237-248 |
| ISSN: | 1001-0742 |
| DOI: | 10.1016/j.jes.2017.09.001 |
| Popis: | Candidatus Accumulibacter has been identified as dominant polyphosphate-accumulating organisms (PAOs) in enhanced biological phosphorus (P) removal (EBPR) from wastewater. This study revealed the relevance of community structure, abundance and seasonal population dynamics of Candidatus Accumulibacter to process operation of wastewater treatment plants (WWTPs) in China using ppk1 gene as phylogenetic marker. All sludge samples had properties of denitrifying P removal using nitrate as an electron acceptor. Accumulibacter abundance in the anaerobic-anoxic-oxic (A2O) process was the highest (26% of total bacteria), and higher in winter than in summer with a better EBPR performance. Type-II was the dominant Accumulibacter in all processes, and type-I accounted for a small proportion of total Accumulibacter. The abundance of Clade-IIC as the most dominant clade reached 2.59×109 cells/g MLSS and accounted for 87.3% of total Accumulibacter. Clade IIC mainly contributed to denitrifying P removal. Clades IIA, IIC and IID were found in all processes, while clade-IIF was only found in oxidation ditch process through phylogenetic analysis. High proportion of clade IID to total Accumulibacter led to poor performance of aerobic P-uptake in inverted A2O process. Therefore, Accumulibacter clades in WWTPs were diverse, and EBPR performance was closely related to the clade-level community structures and abundances of Accumulibacter. |
| Databáze: | OpenAIRE |
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